When I play the game, the UCP flashes... sometimes just a couple of times before stopping, other times it will go on for quite a while.  It hasn't caused a crash so far, or prevented me from playing, but I know it's something that shouldn't be happening.
A few (hopefully) relevant details: 
Uni, NL, FFS, and GL are installed.
Patches for NL and FFS are installed.
All were installed fresh after doing a system recovery on my computer last week and I didn't actually play the game until today.  Ran it briefly the first time... saw the flashing UCP, and exited out to see if I could figure out the cause.  I ran HCDU, removed conflicting hack files, then started the game again, but it was still flashing so it didn't appear to help in regards to the problem.
The hacks I have installed are all either for NL+, or specifically for NL.  (Wondering if NL specific hacks are at least part of the problem.  Does having GL mean I should have chosen OFB specific hacks instead?  I ask because the config log in my Sims 2 folder says my game is "The Sims 2, EP 3".)
OS:  Windows Vista Home Premium (ugh!)
RAM:  1024
HD: 160 GB
Processor:  Intel Celeron 430
Graphics card:  ATI Radeon X1300
Antivirus program:  Avast, which is disabled during game play.
I wasn't sure if I needed to get an error log or not before posting about this, so I decided to wait and see if one was requested first.  So... any ideas on what could be causing this flashing thing to happen?   
